Stop-motion for pit-cages, hoists, &amp;c.



PATENTED JULY 31, 1906.

Y Np,- 827,088..

' G. DUNKELBERG.

STOP MOTION FOR PIT GAGES, HOISTS, 6w:

APPLICATION FILED DEO.8. 1905.

ms NORRIS PETERS cm, wAsHmcrciy, n. c.

UNITED STATES PATENT OFFICE.

GUSTAV DUNKELBERG, OF ESSEN-ON-THE-RUHR, GERMANY. STOP-MOTION FOR PIT-CAGES, HOISTS, 81.0.

. I Specification of Letters Patent.

Patented July 31, 1906.

Application filed December 8,1905. Serial No. 290,865.

To all whom it may concern.-

Be it known that I, GUSTAV DI'JNKELBERG, a subject of the German Emperor, residing at Essen-on-the-Ruhr, in the Kingdom of Prussia, German Empire, have invented a new and useful Stop-Motion for Pit-Cages, Hoists, &c., of which the following is a full and complete specification. The object of the present invention is an arrest or stop-motionfor pit-cages, lifts, and similar apparatus, and is characterized by having'wedges or wedge-shaped bodies which run on a beveled surface and which on the breaking of the rope or cable are pressed against the guide-rails by means of springs and which are then displaced by friction and slip upward between the guides and guiderails and arrest the movement of the cage.

In the accompanying drawings the apparatus is shown in Figure 1 in front elevation, Fig. 2 being a plan view. Fig. 3 showsthe apparatus with broken cable, shows the guides for the wedges.

On the cable or rod a there are chains or ropes b, which are fixed to the hinged arms 0, that are held apart by flat or spiral springs f in such a manner that when the tension on the ropes or chains is released the springs force the arms outward. The stop-wedges or brake-shoes h are held in suitably-shaped guides g, which are directed obliquely upand Fig. 4

ward and are held away from the guide-rails l by the arms 0. The arms 0 are connected in any suitable manner with the wedgeshaped bodies k, such as by rods (1. The rods d engage through slits of the U-shaped guide-rails g and are held in slots 0 of arms 0, where they are free to move up and down. The connection between the bodies h and the arms 0 may, however, be effected in any other suitable manner, and the rods d may be made to embrace the guides g and the arms a.

In case of the breaking of the cable the rod a is drawn downward by a spring in the sleeve 11 in the usual manner, whereby the arms a are forced apart. Thus the bodies 7L are pressed against the guide-rails Z and are forced upward by the friction, so as to wedge themselves between the inclined guides g and rails Z, and thus bring the cage to a standstill. By the spring which actuates the main rod and the cable in a downward direction the release of the arms 0 is safely effected even when the break takes place at a great height or when the cable should happen to loop. The lever-arms 0 may also be replaced by other suitable means. The guide-rails as provided in the present instance may also be replaced by rails in the corners. In this case a body or wedge 7L is provided in each corner, while the arms 0 with the springs should be arranged in duplicate.

at I claim is In a safety appliance for elevators, a pair of spring-influenced arms, means for connecting said arms-t0 the suspending-cable, rods movably engaging the arms, means for guiding the rods along the arms, brake-shoes connected to the rods, and inclined guides engaging the brake-shoes, substantially as specified.

Signed by me at Dusseldorf, Germany, this 27th day of November, 1905.

GUSTAV DUNKELBERG. 

